NMI as active high

[kizo]

Greetings,

I’m using CW10.6 and MK60DN512N. Is there easy way to use NMI pin (PTA4) as active high input? EzPort is already disabled in processor expert, but if the NMI pin is low when I press reset_b, the program won’t start, it gets stuck in Cpu_INT_NMIInterrupt handler.

[mjbcswitzerland · Accepted solution]

Hi

PTA4 defaults to NMI mode on revision 1 of the K60DN512N and this can't be changed - you need to ensure that the input is not connected (it has a pullup) or is driven with '1'.

K60DN512N Revision 2 parts have additional control using the flash configuration (via FTFL_FOPT) as described in the user's manual:

Regards

Mark

[kizo]

Thank you Mark for your reply, that was exactly the problem. I’ve removed pull-down resistor from my board and enabled internal pull-down on PTA4 and everything is working fine.